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Université de Provence - Aix-Marseille I Hyper Articles en Ligne |
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Université de Provence - Aix-Marseille I Hyper Articles en Ligne |
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| HAL : hal-00624127, version 1 |
| DOI : 10.1016/j.micromeso.2010.07.008 |
| Fiche détaillée |  Récupérer au format |
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| Microporous and Mesoporous Materials 135 (2010) 187-196 |
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| Step-wise dealumination of natural clinoptilolite: Structural and physicochemical characterization |
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| Garcia Basabe Yunier 1Inocente Rodriguez-Iznaga 2 |
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| (22/07/2010) |
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| The step-wise dealumination of a natural clinoptilolite has been achieved through a new milder treatment, comprising cycles of aqueous solutions of hydrochloric acid with washing steps. The course of the dealumination was monitored by XRD, FTIR, TGA, UV-vis-DRS and NMR. The XRD patterns show a contraction of cell volume during progressive dealumination steps and a decrease in crystallinity after the third dealumination cycle. The framework and OH vibrations in FTIR spectra show progressive extraction of aluminum atoms from zeolite framework and consequently the formation of silanol nests. 27Al MAS NMR indicates that low levels of octahedral aluminum species are created during the treatments. |
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| 1 : | Zeolites Engineering Laboratory |
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University of Havana |
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| 2 : | materials technology laboratory (imre) |
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University of Havana |
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| 3 : | Institut Charles Gerhardt - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICG ICMMM) |
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CNRS : UMR5253 – Université Montpellier I – Université Montpellier II - Sciences et techniques – Ecole Nationale Supérieure de Chimie de Montpellier |
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| 4 : | Matériaux divisés, revêtements, électrocéramiques (MADIREL) |
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CNRS : UMR6121 – Université de Provence - Aix-Marseille I |
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| 5 : | department of chemistry |
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University College London |
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| 6 : | molecular engineering laboratory (imre) |
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university of la havana |
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| Domaine | : | Chimie/Matériaux |
| hal-00624127, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00624127 | |
| oai:hal.archives-ouvertes.fr:hal-00624127 | |
| Contributeur : Louis-Charles De Menorval | |
| Soumis le : Jeudi 15 Septembre 2011, 18:01:02 | |
| Dernière modification le : Jeudi 15 Septembre 2011, 18:01:02 | |
